Income tax is a direct tax imposed by the central government of India on taxable income of individuals, Hindu Undivided Families, companies, and other entities. Taxable income includes income from salaries, house property, business or profession, capital gains, and other sources. The income tax rates vary from nil to 30% depending on the amount and type of taxable income. The year in which income is earned is called the previous year and is taxed in the subsequent year known as the assessment year.